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Figure 2 and Figure 3 show the result for the compressive strength mortars at 7, 28 and 56 days respectively made with river sand + WA and crushed gneiss sand + WA. These figures show the decrease
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0183;On the one hand, the strength, deformation, and failure behavior of anisotropic rocks at high temperatures is a key concern in deep underground engineering (Liu et al., 2023).Currently, high-temperature uniaxial and triaxial compression tests have been carried out on typical anisotropic rocks including oil shale (Wang et al., 2021), Tournemire shale (Masri et[سؤال
0183;The physical properties of gneiss are characterized by its crystalline structure. The crystal system of gneiss is monoclinic, indicating a complex arrangement of minerals within its composition. The molecular weight of gneiss is 138 g/mol, which suggests a moderate density. The solubility of gneiss is relatively low, with a concentration of 308[سؤال
0183;Igneous rocks, such as basalt and granite, are preferentially selected and were historically used as aggregates because of their recognized technological advantages (e.g., Binici and Aksogan, 2018; Korkan&سؤال
0183;Due to its good gradation and small void ratio, the base course on gr aded gravel has a good anti- deformation capacity and diffusion load capacity, which could effectively alleviate the&سؤال
0183;When shopping for gneiss, it’s helpful to select specific slabs to get the look you want. Uses of gneiss. Gneiss is a terrific stone for many purposes. It tends to be blocky and dense, and makes robust dimension stone for buildings, walls, and landscaping. Gneiss is also a durable choice for interior uses, and makes a fantastic countertop or[سؤال
0183;Sample LB50-5 was a gray biotite gneiss sample collected in the vicinity of Madao village (Fig. 1 c). The geochronology analysis results for this sample can be found in Supplementary Table 1 and are shown in Fig. 4. Zircons extracted from biotite gneiss are long-prismatic and elliptical in shape, with a grain size of 100–200 μm.[سؤال
0183;The quality of the foundation rock at Kalpakkam, Kakrapar, Kaiga and Tarapur is good and compact as the Vp/Vs and Poisson’s ratio of the rock viz. granite gneiss at Kalpakkam and Kaiga and basalt at Kakrapar and Tarapur lies within the range of Vp/Vs = 1.5–2.0 and σ = 0.10–0.33.[سؤال
0183;A comparative study of the technical and economic performances of hydraulic concretes based on three sands with different geological nature has been investigated in this work. Sand from crushed basalt (SB), sand from crushed gneiss (SG) and sand from the river Sanaga were used for the formulation of these concretes. The formulation of these concretes[سؤال
0183;A parameter study using a jaw crusher is designed to investigate the influence of feed gradation, feed rate, crusher setting and crusher speed on the crusher operation and the quality of the&سؤال
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We used Portland cement type II with blast furnace slag, hydrated lime type I, and artificial crushing sand gneiss. The conclusion of the study is that the proposed method is efficient and produces good quality coating mortars using artificial crushing sand, according to pre-established conditions. It is an easy and flexible way to obtain the
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0183;The majority of people on the earth bank largely on groundwater to quench their thirst. In the era of rapid population growth, the over-exploitation of groundwater gives rise to water scarcity, and people find themselves in distress to manage safe drinking water. In this backdrop, the present study is carried out in the terrain of Pre-Cambrian igneous and high- to[سؤال
0183;The calculated relations are in a good qualitative agreement with the sequence of mineral assemblages in the charno-enderbitic vein, while the temperature ranges of stability of these assemblages suits well with the results of thermobarometric calculations. They additionally prove that partial melting of the Sand River gneiss is possible at[سؤال
0183;The artificial sand (M-sand) produced by proper machines can be a better substitute to river sand. Rock crushed to the required grain size distribution is termed as Manufactured sand (M-Sand).[سؤال
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good-quality water. Increased knowledge of geochemical pro- peninsular gneiss followed by quartzite, calc gneiss, sand and silt deposits. Crystalline limestone, sillimanite quartzite, fer-
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0183;Would gneiss make a good aquifer? Gneiss can yield moderate amounts of water, but its productivity is lower compared to granite gneiss and quartzite. Fracturing of the rock can increase its aquifer potential. Sand is a good aquifer because it has high porosity and permeability, allowing water to easily flow through the interconnected spaces[سؤال
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Mapping out and delineating the various elements of the Lewisian Gneiss Complex is difficult, even in well-exposed ground. Hence, the overall gneiss is generally represented on maps as a single unit, but discrete elements can be mapped out in places (Figure 2.1). As in many structurally and metamorphically complex terrains, evidence of the
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from publication: A Comparative Study of Concrete Strength Using Metamorphic, Igneous, and Sedimentary Rocks (Crushed Gneiss, Crushed Basalt, Alluvial Sand) as Fine Aggregate | A comparative study
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0183;The two types of gneiss have scaly fibrous granoblastic texture and gneiss-like structure, and the constituent minerals are plagioclase, amphibole, quartz, potassium feldspar, and biotite (Table 2). The plagioclase gneiss is dark gray or off-white, with 30%–40% amphibole. It has iron mineralization and changes locally to biotite.[سؤال
0183;The laterites have been widely studied both pedologically and geologically. These studies brought scientist to a conclusion that the five factors that have a dominant influence on the formation of these soils are climate, vegetation, parent rock, topography and time [34], [21], [12], [20], [29].The variable combination of these different factors necessarily produces materials[سؤال0183;Groundwater exploration in crystalline basement aquifers such as the Houtriver gneiss formation in the Limpopo province of South Africa is often described as complex. This is because groundwater availability in such aquifers is largely a consequence of the interaction of several processes related to recharge, underlying geological features and fracture connectivity[سؤال
0183;The Funiu mountainous region is within the “soil functional region” defined by the Ministry of Water Resources in China (The Ministry of Water Resources of the People’s Republic of China, 2012) and is one of the regions suffering most from soil erosion in the Huaihe river basin and across the northern mountainous region (Montero, 2005; Liu et al., 2009).[سؤال
0183;The sand content was found to be an important parameter influencing the pore structure of cement mortar. The relationship between the pore structure and strength of cement mortar was found to be good.[سؤال
0183;At 90 days, the maximal values of compressive strength are obtained for conventional concrete CN (37.07 MPa), followed by CG75 concrete made with 25% of river sand and 75% of crushed gneiss (35.09[سؤال0183;The Sand Bay gneiss association is an allochthonous assemblage of supracrustal rocks in the Central Gneiss Belt of the Grenville Province of Ontario. Good linear correlations between fluid&سؤال
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Figure 2 and Figure 3 show the result for the compressive strength mortars at 7, 28 and 56 days respectively made with river sand + WA and crushed gneiss sand + WA. These figures show the decrease
سؤال0183;The breakdown of silicate rocks exposed to the environment, known as weathering, may be both chemical and physical. Simple water attack, which has been considered the most important cause of chemical changes in gneissic rocks (Sharma and Rajamani, 2000), results in various levels of degradation, depending on the rock structure.For example, in a[سؤال
0183;Moreover, steel slag concrete has demonstrated higher compressive strength than concrete mixes made with other low quality aggregates such as Calcareous, Dolomitic and Quartzitic Limestone. It is due to remarkable improvement in the characteristics of interfacial transition zone to porous nature of slag aggregate [18] .[سؤال
0183;The results of the analysis show that concrete made from crushed basalt (CSB) has very good mechanical strengths (34 MPa at 28 days) followed by concrete made with alluvial sand (CSS), (24 MPa at[سؤال
0183;Sections with the highest quality have a value of 1; with medium quality, a value of 2; and with bad quality, a value of 3. There is a good match between the two different quality measures. Only in section 157–162 m is there a remarkable difference present: the log-derived high-defect value is not confirmed by bad quality from visual inspection.[سؤال
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